Soil amendment for cold waterlogged paddy field

Abstract

The invention discloses a soil amendment for a cold waterlogged paddy field, which comprises two components of A and B; the A component is mixed by the following raw materials by weight: 50-60 parts of stove ash, 10-15 parts of blast furnace slag, 20-25 parts of attapulgite, 3-5 parts of gypsum, 3-5 parts of calcium magnesium phosphate fertilizer, 0.2-0.5 parts of zinc sulfate, and 0.2-0.5 parts of borax; the B component is biomass char which is obtained by anaerobic carbonization of rice husk, corn straw, and the like at 300-450 DEG C. The soil amendment of the invention can increase the temperatures of soil and water, improve soil permeability, reduce reductive substance contents, and realize yield increase of more than 20% for paddy rice yield. The original creation of the invention is that after rice transplanting, the biomass char is directly broadcasted on the surface of field water; with the characteristics of low density and deep colors for biomass char, the biomass char is floated on the water surface to absorb sun energy, and thus to increase the temperatures of soil and water, and to improve the cold problem for cold waterlogged paddy fields. The biomass char is rich in nutrients such as phosphorus, potassium, and the like; after the biomass char is broadcasted on water surfaces, nutrients such as phosphorus, potassium, and the like can dissolve in water, and then directly be absorbed and used by crops, which reduces soil adsorption and fixation, increases nutrient utilization efficiency, and promote paddy rice early-stage growth.

Description

technical field [0001] The invention mainly relates to a cold soaking field soil improver and an application method thereof. Background technique [0002] The food issue will dominate the trend of China's agricultural development and the orientation of agricultural policies for a long time to come, and it is also a key aspect that must be considered for the sustainable development of China's agriculture. Ensuring food security is the eternal theme of my country's sustainable agricultural development. The national conditions of our country with more people and less land determine that we must continue to increase the road of grain yield. Healthy and high-fertility soil is the prerequisite for increasing grain yield. At present, there are about 30% of low-yield soil in my country. Due to the existence of soil barrier factors, nutrient supply Imbalance, low water and fertilizer efficiency, and low and unstable crop yields have seriously affected the potential of light and temper...

AI Technical Summary

Problems solved by technology

[0003] The cold soaking field is a reducing paddy soil developed by long-term cold water immersion. Due to long-term cold water immersion, short light time, low water and soil temperature, and damage to the soil aggregate structure, soil permeability deteriorates, and many In anoxic state, organic acids, ferrous ions, manganese ions, H 2 A large amount of S accumulates, resulting in a poor growth environment for rice; the loss of calcium, magnesium, potassium and other base ions in cold soaking fields is serious, the effective nutrient content of the soil is low, the soil production performance is poor, and the productivity is low

Water conservancy engineering measures and farming measures have obvious effects in improving cold-soaked fields, but they are too expensive or labor-intensive and time-consuming, and it is still difficult to popularize and apply them in large areas in production.

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